S Kazemi - Department of Chemistry, Amirkabir University of Technology, Hafez Ave., Tehran, Iran
M Abdoudd - Department of Chemistry, Amirkabir University of Technology
A.A Katbab - Department of Polymer Engineering, Amirkabir University of Technology
M Javanbakht - Department of Chemistry, Amirkabir University of Technology

Put The poor dispersity of silica particles in rubber matrixes is caused by the formation of a secondary structure (aggregate and agglomerate) of silicaparticles via silanol groups on the silica surfaces. To enhance the interfaces between silica nanoprticles and SBR matrix and preventing silanol interfering incuring system, silica surface should be modified. In the present study, 3-Aminopropyl triethoxy silane and 3-Mercaptopropyl trimethoxy silane have beenemployed to treating the silica surface. Tensile was performed for determination of interfacial properties of the Silica/SBR nanocomposites. The result showedincreasing in moduli at 100% elongation and reduction in peak strain and elongation at break, for nanocomposites with modified silica. SEM images confirm better dispersion of nanosilica in modified silica-filled SBR nanocomposites.